arch/x86: Replace some __SMM__ guards

We generally do not guard source in attempts to reduce
the final object sizes, but rely on garbage collection.

Most of the __unused attributes inserted here will be
removed when remaining __SIMPLE_DEVICE__ guards can
be removed.

Change-Id: I2440931fab4f41d7e8249c082e6c9b5a9cd0ef13
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36641
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/baytrail/pmutil.c

@@ -16,7 +16,9 @@
 #include <stdint.h>
 #include <arch/acpi.h>
 #include <arch/io.h>
+#include <device/device.h>
 #include <device/mmio.h>
+#include <device/pci.h>
 #include <device/pci_ops.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -37,10 +39,7 @@ static inline pci_devfn_t get_pcu_dev(void)
 	return pcu_dev;
 }
 
-#else /* !__SMM__ */
-#include <device/device.h>
-#include <device/pci.h>
-
+#else
 static struct device *pcu_dev;
 static struct device *get_pcu_dev(void)
 {